Patents by Inventor Akitaka Hiruta

Akitaka Hiruta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Displacement detecting apparatus using graduated linear scale
    Patent number: 5247165
    Abstract: A displacement detecting apparatus comprises a non-contacting sensor for detecting a displacement of a measured surface, a linear scale unitarily attached to the non-contacting sensor through a coupling member, a graduation read-out device for reading out a graduation of the linear scale, an actuator for moving the non-contacting sensor and the linear scale, and a servo control circuit for driving the actuator, wherein the linear scale and the non-contacting sensor are moved by the actuator in unison with each other. Thus, the displacement of the measured surface can be detected with high accuracy.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: September 21, 1993
    Assignee: Sony Corporation
    Inventors: Akitaka Hiruta, Kayoko Taniguchi, Takao Yukawa